Telephone switch



Feb. 9 1926. 1,572,380

E. H. CLARK TELEPHONE SWITCH Filed DEQ. l2, 15923 Cil Patented Feb. 9,-

onirsn srarss PTEN? @Fil EDGAR El. CLARK, 0F RIGHMONB HILL, NEW Y@ ,112, ASSGNOR TO WESTERN ELEC- TRIC COMPATY, INCORFORATED, OE' N YORK.

EW N. Y., A CORORATION OF NER/V TELEPHGNE SWITCEI.

Application filed Dece'mier .To Zito/ 7mm t may concern."

y ile it known that i, EDGAR H. (linnn, a uitleen oi the United States oit iiineric., residing at R'chinond Hill, Long island, in the county oil Queens and State of New York, have invented certain new and useful Improvements in Telephone Elwitches7 oi' which the following is a full, clear, corcise, and exact description.. y

This. invention relates to telephone switches and more specilieally it pertains to a loclrng device, adapted for use in aulomatic` and sen'ii-autoniatic telephone switches or the type disclosed in llatent No. 1,5%,7357 granted to Charles L. Goodruni et al. on November 18, 192i; 'l'or holding the horizontal-bar in operated position to vperinit the deenergization of the bar operatinginagnet throughout the duration ot' an established connection.

The object oil this invention is to iur prove the construction of such telephone switches by providing means whereb7 sets or" active contacts are held in engagement with setsv ot passive contacts throughout thelduration of an established connection in a simple and positive nianner.

. In accordance with the foregoing object, a ieature of the invention resides in the provision ot a pair of interlocking' latch ineinbers whereby the operating bar and the 'contacts served thereby are held in operated position after the initial energization ot an operating magnet therefor.

Another feature ot the invention is the provision oi a inagnet armature and n'ieans whereby a pivoted ineinber is disengaged from an associated latch ineinber for releasing the bar and the contacts upon a subsequentenergization of the operatingv insg net.

@tirerfeatures and advantages of the invention will appear troni the it'ollowing description and by the claims appended here to7 reference lwing had to the accompanying drawings in which Fig. .l is a partial assembly view ot a switching' device showing` the locking device in normal non-opcrated position; Fig. 2 a view similar to that of F 1 .showing the active contacts and their operated bar locked in operated position, and Fig. 3 is la partial assembly view ot' the operating finechanisin showing the releasingspringin'operable relation with the pivcted leling aneinher.

l?, 1923. Seil N0. 680,173.

Similar reference characters reler to similar parts throughout the several views.

The switch structure in which this loclo ing device is particularly well adapted lier use generally consists ot a. pluralitp7 et active contact sets which are adapted to be inoved into engageable relation with sets et passive ycontacts through the movement ot an operating bar therefor.

Frach set oi active contacts consists ot a pluralit;7 of bare wires 10, 11 and l2 which are moulded into an insulating' support 'lheld securely at both ends ot the swi -i trame (not shown). For each set et contacts 105 11 and 1Q there is provided an operable insulating card lll; arranged in a suitable guiding member E). Each set oi" active contacts 107 11 and 'l2 threads through the insulating card 14; and extends therefrom in juXta-position with associated grid wires 15, 16 and 17 which are interwoven with insulating bars, such as bar 18, shown in Fig. 1.

For each card 1i there is provided a retractng spring 19 which is secured at one end portion on the insulating support 1i-l and is adapted to normally hold the card 14: and the active contacts 10, 11 and l2 served therebyY out ot engagement 'frein their associated grid wires 15, 1G and 1'? as illustrated by the two sets of contacts shown in Fig. 1.

For each retracting spring 1) there provided a lifting linger 20 wh'ch is secured on a rotatable har 21 and is adapted to engage and move its associated spring 19, upon each movement ot' the har 9.1, troni normal, to operated position. rlhe bar 21 is journalled at one end portion on the sup porting traine 2Q et an electro-magnet 23 and the other end on a similarly disposed -trarne (not shown), On one end portion of bar 21 there is provided an operating arin 24; which extends therefrom in operable relation with the arm 25 of a longitudinellyT movaliile Tsoapcd nieinbor l Y @o which in turn is disposed in operable relation with the U-shaped portion oi an arm 27. 'ihis arin is secured on the arnrature 2S which adapted to rotate the bar 2i and the lit`ting linger 2O carried thereby in response to each initial energization ot' magnet Q3. rlhe pivoted member 38 which is hooloshaped is arranged on a portion oit the trarne 22 and is adapted to latch with the T-shaped meinber when the latter member is moved by arm 2T into the position shown in Fig. 2 thereby locking the hook-.shaped member 26 and the bar 2l in an operated position against the resistance ot the bar retracing spring 30 which is hooked on the tree end .portion ot' arm 2a and on a lug 3l ot bracket 22. rllhe hook-shaped member 3S is held in engageable relation with its associated T-shaped member 26 by means ot snrng 29 which is detachably fastened on a lng integrally formed with hook-shaped member 38 and a lug 6 ot trame Upon the initial movement ot T-shaped member imparted through the energizat'ion o'j magnet 23, the br l and the lifting lingers carried thereby rc1 lain in operated position through the interlocking ot' members and 38, to permit the deenergization ot' magnet 23.

It is to be noted that the spring 32 carried by the arm 27 is arranged to normally move ineliectively over the baclr surface of hook-shaped member 3S and thereby assist in moving the hook-shaped member 3S into engagement with T-shaped member 2G. spring 33 is provided tor returning the armature 27 to normal nnoperated position which is indicated by the dotted' line shoivn in Fig. Upon a subsequent movement ot arm 27 imparted through the energizaton ot magnet 23 the releasing` spring 32 engages the camming portion Sil ot hook-shaped member 38 and moves this member ont ot engagement from T-shaped ymember 2G which is returned to normal position through the tension ot spring 30 acting to return the bar 2l to normal position tor releasing the retracting spring 19 thereby disengaging the active contacts l0, l1 and l2 troni their associated grid ivires l5, 1G and 17, respectively.

The invention claimed is:

l. In a switching n'iecbanisin, the conibination ot sets ot disengaged contacts, a rotatable bar, an operating magnet. tor said bar, an armature responsive to the energi- Zation ot said magnet for operating said bar, an arm iiXedly attached to said bar, a lifting bar lixedly attached to said armature, a longitudinally movable member arranged in engageable relation with said arm and said lifting bar` and means cooperating with said longitudinallyY movable member ttor retaining said rotatable bar in operated position lor holding said contacts in engagement ivhen said magnet is decnergized.

2. In a switching mechanism, the combination of sets of disengaged contacts, a rotatable bar, an arm lixedly attached to said bar, an operating magnet for said bar, an armature for said magnet, a lifting bar tixedly attachedl to said armature, said lifting bar being arranged to litt said arm to operate said rotatable bar when said magnet is energized to interengage said contacts, a longitudinally slidable member disposed in engageable relation with said arm and said lifting bar, and means cooperating with said longitudinally movable member l'or re aining said rotatable bar in operated position tor holding said contacts in engagement when said magnet is deenergized.

3. In a switching mechanism, the combination of sets ot disengaged contacts, a rotatable bar, an arm iiziedly attached to said bar, an opera-ting magnet for said bar, an armature `for said magnet, a liftingbar tinedly attached to said armature, a longitudinally movable member disposed in engageable relation with said arm and said litting bar, a pivotal member for engaging said longitudinally movable member ttor retaining said rotatable bar in operated position tor holding said contacts in engagement when said magnet. is deenergized, and meansA attached to said lifting bar tor eiecting a positive engagen'ient between said pivotal and said longitudinal members when saidl contacts are interengaged.

4s. In a switching n'iechanism, the con bination of sets of disengaged contacts, a rotatable bar, an arm iixedly attached to said bar, an operatingl magnet for said bar, an armature for said magnet, a lifting bar iixedly attached to said armature, a lengt tndinally movable T-shaped member disposed in operable relation with said arm and Ysaid lifting bar, a pivotal hook-shaped member for locking said Tshaped member in an operated position thereby niaintaining: the rotatable bar operated and said contacts in engagement after said magnet has been energized. and means for effecting a positive interlocking ot' said T-shaped and said hook-shaped members, said means being also arranged to ediect the release ot said lockingT member when said magnet is subsequently energized. Y i

ln witness whereof, l hereunto subsrn'ibe my naine this 5th day ot lleeember il. l.. 1923.

EDGAR H. (HARK. 

